import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

class Test08 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Stack(
        alignment: Alignment.center,
        children: [
          Container(
            width: 200,
            height: 200,
            color: Colors.red,
          ),
          Container(
            width: 150,
            height: 150,
            color: Colors.yellow,
          ),
          Positioned(
            left: 30,
            top: 40,
            right: 50,
            bottom: 60,
            child: Container(
              width: 100,
              height: 100,
              color: Colors.blue,
            ),
          )
        ],
      ),
    );
  }
}
